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This Procedure Includes the Following:
Replacing/Repositioning/Installing Front
Caster Assemblies
Replacing Front Fork
Repairing/Replacing Front Caster Tire/Tube
90
o
Adjustment of the Caster Headtubes
Caster Headtube Mounting Adjustments
Installing Quick-Release Casters
WARNING
After adjustments and before use, make sure
all attaching hardware is securely tightened.
REPLACING FRONT FORK (FIGURE 2)
1. Remove the front caster assemblies from the
wheelchair. Refer to REPLACING/REPOSITION-
ING/INSTALLING FRONT CASTER ASSEM-
BLIES in this section of the manual.
2. Remove the head tube cap.
3. Remove the locknut and nylon washer.
4. Drop the fork out of the caster head tube.
5. Slide the new fork into the caster head tube.
NOTE: Check bearing assemblies and replace if
necessary.
6. Ensure that fork slides completely into the caster
head tube.
7. Install nylon washer and secure with locknut.
WARNING
Improper positioning of the washer will prohibit
the free movement of the forks.
8. Remove the front caster assemblies from the
wheelchair. Refer to REPLACING/REPOSITION-
ING/INSTALLING FRONT CASTER ASSEM-
BLIES in this section of the manual.
9. To properly tighten caster journal system and
guard against flutter, perform the following check:
a. Tip front of wheelchair off floor.
b. Pivot forks and casters to top of their arc
simultaneously.
c. Let casters drop to bottom of arc (wheels
should swing once to one-side, then immedi-
ately rest in a straight downward position).
d. Adjust locknuts according to freedom of caster
swing.
e. Test wheelchair for maneuverability.
Black Dust
Cover
Locknut
Large
Plastic
Washer
Washer
Caster
Fork
Assembly
FIGURE 2 - REPLACING FRONT FORK
Three and five
inch front caster
shown only for
clarity.
FIGURE 1 - REPLACING/REPOSITIONING/
INSTALLING FRONT CASTER ASSEMBLIES
Locknut
Front Caster
Spacer
Fork
Spacer
REPLACING/REPOSITIONING/INSTALLING
FRONT CASTER ASSEMBLIES (FIGURE 1)
1. Remove the hex bolt, spacers and locknut that
secure the front caster to the fork.
2. Remove the front caster from the fork.
NOTE: If replacing a front caster on a six or eight
inch front fork, note the mounting position of
the existing front caster for installation of the
new front caster.
NOTE: If repositioning front casters on a six or
eight inch front fork, refer to CHANGING SEAT-
TO-FLOOR HEIGHT in PROCEDURE 9 of this
manual to determine the front caster position
needed for the required seat-to-floor height.
3. Replace front caster and reverse STEPS 1- 2.
C
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CASTERS PROCEDURE 5
Hex Bolt